This study examined the determinants of healthy food purchases before and after COVID-19 in Korea. Binomial and multinomial logistic regression models were applied to Korea Rural Economic Institute's Food Consumer Behavior Survey data from 2019 to 2021. The analysis revealed a significant decrease in the non-intake of healthy food in 2021 compared to 2019, suggesting the impact of COVID-19 on healthy food consumption. Consumption patterns also changed, with a decrease in direct purchases and an increase in gift-based purchases. Several variables showed significant effects on healthy food intake. Single-person households exhibited a higher probability of eating healthy food after COVID-19. The group perceiving themselves as healthy had a lower likelihood of consuming healthy food pre-COVID-19, but this changed after the pandemic. Online food purchases, eco-friendly food purchases, and nut consumption showed a gradual decrease in the probability of non-intake over time. Gender and age also influenced healthy food intake. The probability of eating healthy food increased in the older age group compared to the younger group, and the probability increased significantly after COVID-19. The probability of buying gifts was significantly higher in those in their 60s, indicating that the path to obtaining healthy food differed by age.

The purpose of this study was to examine the impacts of AI-integrated MALL on Korean students’ TOEIC preparation, by comparing with AI-integrated CALL. A total of 496 freshmen students participated in this study. They were arbitrarily assigned to AI CALL (n = 190), AI MALL (n = 164), and the control (n = 132) groups. During a 2021 academic semester, the two experimental groups studied TOEIC through computers or mobile phones, integrated with AI technology. The control group was taught by a human teacher, in a traditional classroom setting. Before and after the treatment, TOEIC listening and reading tests were administered. Paired samples t-tests and one-way ANOVAs, were used to analyze collected data. Findings show that all groups significantly increased listening and reading test scores. Group comparison results show that the AI CALL group outperformed the control group for both tests. This group also outperformed the AI MALL group for the reading test. Based on this, pedagogical implications are invaluable

The purpose of this study is to determine whether the use of artificial intelligence (AI) improves English listening and reading proficiency. It focuses on whether its impacts differ by gender and major. The study was conducted in 2020 with 340 freshmen students in Korea. There were 182 male and 208 female students. The participants majored in different areas: 139 students majoring in aeronautics, 130 students studying policing and safety, 121 students studying in the arts department. The TOEIC test was adopted as pre- and post-tests to explore the impacts of using AI on English learning. To analyze the data, two-way ANOVAs were administered. The study found no interaction effects of gender or major on either listening and reading proficiency. However, gender and major, respectively, had significant impacts on listening. Regarding reading proficiency, major alone affected the students’ performance. Based on these findings, pedagogical implications are considered.

This study explores effects of e-book and audio-book on EFL comprehension. It was conducted at a university in Korea with 75 college students. The whole experiment lasted for five weeks in 2020. To determine effectiveness of multiple modalities, participants were assigned to three different experimental groups: e-book, audio-book, and e-audio-book (a combination of e-book and audio-book) groups. While the e-book group was provided with passages in a text format, the audio group received the same passages in an audio format. The e-audio-book group was given both text and audio formats. At the beginning and end of the treatment, pretest and posttest were administered. As expected, the e-audio-book group benefited more than the other two groups in listening comprehension. However, they showed better performance in reading comprehension than the audio-book group only. Additionally, the e-book group performed better in reading comprehension compared to the audio-book group. Based on these findings, pedagogical implications are made.

This study focused on the perceptions of the use of different types of songs on Korean EFL students in language learning. For this study, two other variables, proficiency and gender, were also examined. In the study, 197 undergraduate students took part. All participants were taking an English course at a university in Korea. The three types of songs-pop songs, children’s songs, and movie songs-were used in class for nine weeks in 2019. A perception survey about stress, confidence, and interest in EFL learning was carried out. A one-way ANOVA was utilized to compare the participants’ perceptions and learning through the three different types of songs. Findings revealed significant difference between children’s songs and pop songs regarding stress. There were also significant differences in confidence and interest depending on proficiency levels. Participants’ gender also affected stress levels during the use of songs for English learning. This study shed light on the use of songs in the EFL context with a more comprehensive view of students’ reactions and preferences towards the different types of songs. Limitations of the study were suggested at the end of the paper.

전라북도는 곤충사육농가의 77%인 121농가가 흰점박이꽃무지를 사육하고 있고 농가수의 증가가 예상됨에 따라, 생산단가를 절감시키면서 효율적인 사육을 위해서는 사육환경을 최적으로 유지하는 것이 매우 중요하다. 따라서 본 연구에서는 뽕나무발효톱밥을 이용하여 유충사육밀도에 따른 유충발육상황을 조사하였다. 최적 사육밀도 설정을 위하여 전라북도 사육농가에서 가장 많이 사용하는 20L 크기의 사육 상자에 각각 100, 125, 150, 175, 200마리 흰점박이꽃무지 유충을 넣고 뽕나무발효톱밥을 2/3정도 채운 후 사육하면서 유충무게변화, 생존율 등을 조사하였다. 부화 후 95일 흰점박이꽃무지 유충 생존율은 평균 81%로 사육밀도별 큰 차이가 없었다. 유충 무게는 100마리/20L 사육 시 2.219g로 가장 높게 나타났으며, 사육밀도가 증가함에 따라 감소하는 경향으로 나타났다. 유충 영양성분 조사결과 단백질 52.8g/100g, 지방 11.8g/100g이었으며, 중금속은 검출되지 않았다.

The objectives of this study were to find out the plant to enhance immune activity among 42 kinds of foods frequently consumed by the Korean elderly consisting of 5 food groups and 5 wild plants. Each sample was assessed the immunoactive effect by measuring NFkB/ AP1 gene expression, nitric oxide and cytokine production in RAW-Blue™ cell. Soybean sprouts of 47 plants showed the highest NF-κB/AP1 gene expression at the level of 1.13 ± 0.03 (O.D. 650 nm) and Soritae, sweet potato, banana, apple, garlic, crown daisy, cabbage and Ailanthus altissima also had high activity of NF-kB/AP1 gene in RAW-Blue™ cell stimulated by LPS. NO production of Ailanthus altissima was significantly higher than that of other plants and 16 plants of glutinous sorghum, black rice, Seoritae, Heuktae, sweet potato, banana, apple, garlic, mungbean sprouts, spinach, crown daisy, young pumpkin, cabbage, soybean sprouts, Actinidia arguta and Aster scaber were the next best activity. The above results selected 17 out of 47 plant samples. Moreover, soybean sprouts was significantly shown to increase TNF-α (1,509.55 ± 1.38 pg/mL) and IL-1β (54.56 ± 1.08 pg/mL) cytokines in comparison with RAW-Blue cell stimulated by LPS. According to the results of in vitro evaluation, the ethanol extract of soybean sprout increased the production of immune-enhancing cytokines by proliferation of macrophages. In addition, NF-kB transcription factor activity and NO production ability were excellent, and it was selected as a material having excellent immunological activity.

This study reports the effects of text chat on EFL students’ writing fluency, accuracy, and complexity, investigating whether its effects differ according to the interlocutor. The experimental design employed three text chat groups: one between two nonnative speakers (NNS-NNS); another between a nonnative speaker and a native speaker (NNS-NS); and the other between a nonnative speaker and a nativelike chatbot (NNS-NC). 78 college students of English as a foreign language between 19 to 22 years old were sampled and assigned into the three groups, each consisting of 30, 20, and 28, respectively. Over a 16-week period, they engaged in ten 10-minute-long chat sessions. All groups were tested before and after the treatment. A paired-samples t-test was conducted to compare preand post-test scores as far as fluency, accuracy, and complexity concerned. To find out the differences between mean scores of the groups, a one-way analysis of covariance (ANCOVA) was run. Results indicated that all three groups showed significant improvement in accuracy while only NNS-NS and NNS-NC groups did in fluency. No effects for complexity were evident. In terms of group differences, no statistical significance was detected. Participants’ perceptions of English learning and text chat positively changed overall. This study has pedagogical implications for EFL teachers, students, and researchers.

The current study explores the effects of different types of voice-based chat on EFL students’ negotiation of meaning according to proficiency levels. Participants included 123 Korean university students of English. They were divided into two voice-based chat groups: student-student voice-based chat and student-chatterbot voice-based chat. The experiment was administered throughout one semester, 16 weeks. Negotiation of meaning evident in the chats was coded for confirmation check, comprehension check, clarification requests, repetition, and reformulation, and was measured by counting the number of meaning negotiation moves. Important findings were as follows: Firstly, there were significant differences between the first chat and the last chat. The mean frequencies of negotiation moves at all proficiency levels positively changed over time as a result of participating in student-chatterbot voice-based chat. Particulalry, student-chatterbot voice-based chat, as compared to student-student voice-based chat, allowed students to use more negotiation strategies, and the strategies used in the chats also appeared to be different according to the students’ proficiency levels. Lastly, positive perceptions of voice-based chat were observed at all proficiency levels. This study provides empirical evidence to substantiate the effects of voice-based chatterbots in oral interaction. Based on the findings, pedagogical implications are made on the effective implementation of voice-based chatterbots in EFL contexts.

This study investigates how voice-chat conditions affect learners’ affective factors. In order to examine the effects of voice-chat conditions on Korean EFL learners’ attitudes towards English language learning and perceptions of voice-chat, 123 college students participated in this study. Participants were divided into two experimental groups: voice-chat with peers and voice-chat with robots. During the 16-experiment week, participants had a chat with either peers or robots. All participants in both voice-chat conditions showed positive attitudes towards English language learning and positive perceptions of voice-chat. Results indicate that both voice-chat conditions are effective in enhancing the learners’ confidence in English speaking, motivation to develop their English language skills, interests in English language learning, and beliefs in the improvement of their English speaking ability. In addition, engagement in voice-chat appears to help learners to reduce their stress and anxiety level. Findings suggest that EFL teachers integrate chat robots into their language teaching process.

가상현실 기술이 발전하면서 체감형 게임분야와 같이 인간의 신체 동작을 게임의 지각적인 조작활동에 반영하는 게임 인터페이스에 대한 관심이 높아지고 있다. 이는 플레이어의 만족도를 향상시키며, 다양하고 새로운 콘텐츠 개발을 가능하게 하기 때문에 이 같은 인터페이스를 모델로 한 사용자 경험에 대한 연구의 중요성이 점차 증대되고 있다. 본 논문에서는 내추럴한 Input 시스템을 사용한 3D 제스처 인터페이스를 제안하고, 이를 사용성 및 만족도 측면에서 닌텐도사(社)의 Wiimote와 비교 분석하였다. 분석 방법으로는 전통적인 인간-컴퓨터 상호작용(Human-Computer Interaction; HCI) 측정 표준으로 효과성(effectiveness), 효율성(efficiency) 및 만족도(satisfaction)를 준거해 사용자의 전반적인 만족도를 검토해 보았다.

Barley (Hordeum vulgare L.) and barley byproduct, waxy and non waxy genetic type, were prepared and investigated for its biological activity. The total phenolic contents, tyrosinase and xanthin oxidase inhibition activity of the barley extracts were measured and compared with those of a barley byproducts extracts powder. The contents of total phenolic compounds of the barley byproducts, waxy and non waxy type, were 18.60 and 17.92 mg/g of sample, respectively. Inhibition rates (%) of the mushroom tyrosinase of the waxy type barley and barley byproducts extracts powder were 16.30 and 33.60% at 250 ppm, respectively. Tyrosinase inhibition activity of barley byproduct extracts regardless of waxy and non waxy type showed higher than that of arbutin (5%). The samples showed an inhibition effect of xanthin oxidase. At 2,500 ppm of sample concentration, the inhibition effect of xanthine oxidase of waxy type barley (WB), non waxy type barley (NB), waxy type barley byproducts (WBP), and non waxy type barley byproducts (NBP) was 9.92, 16.06, 14.11, and 13.86%, respectively.